Corrupted DWG File Repair

I have a DWG that suddenly refuses to open and, when forced, reports multiple errors. I need someone who has already rescued damaged AutoCAD drawings to inspect the file, purge the corruption, rebuild any broken database objects, and return it to full working order. Wherever elements or dimensions are recoverable, please keep them intact so the drawing matches its original state; if something cannot be salvaged, include a short note explaining what was lost or redrawn so I know where to review.

The only deliverable I need is the fixed DWG, ready to load in recent AutoCAD editions without triggering audit errors. If you’re comfortable using commands such as RECOVER, AUDIT, -PURGE, or third-party recovery utilities—and you’ve done this before—let’s get started.